Tehran: Iran will retaliate if the United States takes action against fuel deliveries to Venezuela, country's Foreign Minister Mohammad Javad Zarif said on Sunday.

"The US bears responsibility for the consequences of any illegal actions ... Iran has the right to take any necessary measures to counter these threats," Zarif was cited in a letter to UN as quoted by the Sputnik.

This letter comes at the backdrop of reports that the US was looking at possible measures against the oil shipments to Venezuela, which Washington considers illegal.